EvaluateRactangleCompact EvaluateRactangle::create_compact(double ratio)
{
assert(ratio > 0);
assert(_correction == 1);
auto scaled = copy_scaled(ratio);
return EvaluateRactangleCompact(scaled._x1, scaled._y1, scaled._x2, scaled._y2, scaled._corrected_weight);
}
/* Renders count frames from shm into dst. Updates count if anything is
* written. If it's muted and the only stream zero memory. */
size_t cras_mix_add_stream(struct cras_audio_shm *shm,
size_t num_channels,
uint8_t *dst,
size_t *count,
size_t *index)
{
int16_t *src;
int16_t *target = (int16_t *)dst;
size_t fr_written;
int fr_in_buf;
size_t num_samples;
size_t frames = 0;
float mix_vol;
fr_in_buf = cras_shm_get_frames(shm);
if (fr_in_buf <= 0)
return 0;
if (fr_in_buf < *count)
*count = fr_in_buf;
/* Stream volume scaler. */
mix_vol = cras_shm_get_volume_scaler(shm);
if (cras_shm_get_mute(shm) ||
mix_vol < MIN_VOLUME_TO_SCALE) {
/* Muted, if first then zero fill, otherwise, nop. */
if (*index == 0)
memset(dst, 0, *count * num_channels * sizeof(*src));
} else {
fr_written = 0;
while (fr_written < *count) {
src = cras_shm_get_readable_frames(shm, fr_written,
&frames);
if (frames > *count - fr_written)
frames = *count - fr_written;
if (frames == 0)
break;
num_samples = frames * num_channels;
if (*index == 0)
copy_scaled(target, src, num_samples, mix_vol);
else
scale_add_clip(target, src,
num_samples,
mix_vol);
fr_written += frames;
target += num_samples;
}
*count = fr_written;
}
*index = *index + 1;
return *count;
}